3x − 2y = 19
y = 2x − 14

(9,4)

Step-by-step explanation

You can use substitution:

plug in y=2x-14 into 3x-2y=19

3x-2(2x-14)=19

then simplify it

3x-4x+28=19

-x+28=19

-x=-9

divide everything by -1

x=9

Then plug in x=9 into the equation to find y

y=2x-14

y=2(9)-14

y=18-14

y=4

To check your answer plug x and y back into the equation

3(9)-2(4)=19 check

4=2(9)-14 check

question 1 is 8, question 2 is 9, question 3 is 24

step-by-step explanation:

now, the numbers they give you at the top are the key. from there, you just have to plug and chug! let's try 1, 2, and 3!

key: a=3, b=5, c=6

1. a+5

remember, a=3, so we plug that in to get 3+5=8

2. 15-c

c=6, so we plug that in to get 15-6=9

3. 4b

b=6, so we plug it in to get 4*6=24

time to try the rest on your own! if you put the answers below in a comment, i'll check them for you!

3. (5x + 1) - (-10x + 6)

simplify the answer choice. combine like terms. remember to distribute the negative to the terms inside the second parenthesis. also remember that two negatives = one positive, and one of each sign = negative.

- (-10x + 6) = + 10x - 6

simplify. combine like terms:

5x + 1 + 10x - 6

5x + 10x + 1 - 6

15x - 5

∴ it is your answer

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